Piping spool fabrication
Pipe, fittings and flanges delivered as finished spools rather than as loose material: cut, fitted, welded, examined, tested and marked to your isometrics, with one documentation file covering the material and the work done to it.
One supplier, one file
The mill certificate, the weld map, the NDT report and the test certificate arrive together, referenced to the same spool number. Nothing has to be reconciled between a stockist and a fabricator afterwards.
Site hours, not shop hours
Welding done under cover and tested before it ships is welding not being done on a scaffold. The saving is in the programme, not in the steel.
Material we already price
Spools are built from the same range the catalogue carries — carbon, stainless, alloy, nickel alloy, duplex and super duplex — so a package can be part loose material and part fabricated on one quotation.
From drawing to delivery
- Isometric or drawing — Take-off from your isometrics, GA or P&ID. Where only a line list exists, the spools are marked up and agreed before anything is cut.
- Material — Pipe, fittings and flanges drawn from the same range the catalogue prices, to the grade the drawing calls for, with the mill certificates retained against the spool.
- Cutting and fit-up — Cut to the isometric, bevelled to the weld preparation the procedure specifies, fitted and dimensionally checked before welding.
- Welding — To qualified procedures, with each weld recorded against the welder and the spool on a weld map.
- NDT — Visual, dye penetrant, magnetic particle, radiographic or ultrasonic examination to the extent the code and the client specify.
- Pressure test — Hydrostatic or pneumatic test at the pressure the design calls for, witnessed where the project requires it.
- Painting and coating — Surface preparation and coating to the project specification, or supplied bare where the site coats.
- Packing and delivery — Marked, listed and packed spool by spool, with the documentation file — MTCs, weld map, NDT and test reports — delivered with the steel.
Materials and codes
| Item | Scope |
|---|---|
| Carbon steel | ASTM A106 Gr.B · A234 WPB · A105 · EN equivalents |
| Stainless steel | ASTM A312 TP304/304L, TP316/316L, TP321 · A403 · A182 |
| Alloy steel | ASTM A335 P11, P22, P91 · A234 WP11, WP22, WP91 · A182 F11, F22, F91 |
| Duplex & super duplex | ASTM A790 S31803, S32205, S32750 · A815 · A182 F51, F53 |
| Nickel alloys | Alloy 625, Alloy 825 and equivalents |
| Design codes | ASME B31.1 power piping · ASME B31.3 process piping · EN 13480 |
| Certification | EN 10204 3.1 or 3.2 on the material, with the fabrication records against it |
What to send for a spool enquiry
- the isometrics, or the GA and the line list
- the piping class or the specification the line is built to
- the design code — ASME B31.1, B31.3, EN 13480
- the NDT extent and the acceptance criteria
- the test pressure, and whether the test is to be witnessed
- the coating specification, or bare
- the delivery sequence — spools are rarely all wanted at once
Send the isometrics
A spool package is priced from the drawings, not from a catalogue. Send what you have and it comes back as a fabrication quotation with the material, the work and the testing separated out.
Send your line list Browse the catalogue